doc: Remove superfluous 'index'
doc: Remove superfluous 'index'

We're not setting any sort of index. Remove for now.

Signed-off-by: Tiago Vignatti <f080760b2054d506aacc8dee97f8804c19fbc3aa@intel.com>

sir-murray/wayland,abooij/wayland,sir-murray/wayland,sir-murray/wayland,abooij/wayland,eyolfson/wayland,mchalupa/wayland,eyolfson/wayland,mchalupa/wayland,tulcod/wayland,bitfactor/wayland,eyolfson/wayland,bitfactor/wayland,mchalupa/wayland,tulcod/wayland,abooij/wayland,bitfactor/wayland,tulcod/wayland